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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

        var score = parseInt(window.prompt('input'));

        if(score > 90 && score <= 100) {
            document.write('alibaba');
        }
        if(score > 80 && score <= 90) {
            document.write('tencent');
        }
        if(score > 70 && score <= 80) {
            document.write('baidu');
        }
        if(score > 60 && score <= 70) {
            document.write('mogujie');
        }
        if(score <= 60) {
            document.write('你不是我教的');
        }
// 条件具有互斥性，下面这样写最好，如果两个条件之间有交叉点，则不能用else if
        if(score > 90 && score <= 100) {
            document.write('alibaba');
        }else if(score > 80 && score <= 90) {
            document.write('tencent');
        }else if(score > 70 && score <= 80) {
            document.write('baidu');
        }else if(score > 60 && score <= 70) {
            document.write('mogujie');
        }else {
            document.write('你不是我教的');
        }

    </script>
</body>
</html>